Friday, July10, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Boston, MA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:15AMSunset 8:23PM Friday July 10, 2020 11:47 PM EDT (03:47 UTC) Moonrise 11:51PMMoonset 10:41AM Illumination 69% Phase: Waning Gibbous; Moon at 20 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
    EDIT      (on/off)   Help
ANZ230 Boston Harbor- 1016 Pm Edt Fri Jul 10 2020
.small craft advisory in effect from 10 am edt Saturday through Saturday afternoon...
Overnight..SE winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. Patchy fog. Showers. Vsby 1 to 3 nm.
Sat..S winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. Patchy fog in the morning. A chance of showers in the morning.
Sat night..S winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 2 ft.
Sun..SW winds 10 to 15 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft.
Sun night..SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Waves around 2 ft in the evening, then 1 foot or less.
Mon..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Mon night..SW winds 5 to 10 kt. Waves around 2 ft in the evening, then 1 foot or less. A chance of showers.
Tue..SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Tue night..W winds 5 to 10 kt. Waves 1 foot or less.
Wed..SW winds 5 to 10 kt. Waves 1 foot or less.
Wed night..SW winds 5 to 10 kt. Waves 1 foot or less. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 1016 Pm Edt Fri Jul 10 2020
Synopsis for massachusetts and rhode island coastal waters.. Tropical storm fay will impact mostly the south coast and outer eastern waters this evening into Saturday with high surf and dangerous rip currents. A cold front will cross the waters early Sunday and another cold front crosses the water Monday. Warm front lifts north on Wednesday. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the current hazards link above the map on the left.


7 Day Forecast for Marine Location Near Boston, MA
   Hourly   EDIT   Help
location: 42.36, -71.02     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KBOX 110100 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 900 PM EDT Fri Jul 10 2020

SYNOPSIS.

Periods of showers with brief heavy rainfall are still expected overnight, but the threat of flooding has diminished. Most of the showers will come to an end by mid morning Saturday, but it will be quite humid and a few strong thunderstorms are possible later Saturday afternoon across western Massachusetts and northern Connecticut. Beyond Saturday, things remain unsettled with periodic shower and thunderstorm chances through the first half of next week. Slightly cooler and less humid conditions for Monday and Tuesday. Heat and humidity returns on Wednesday and Thursday.

NEAR TERM /UNTIL 6 AM SATURDAY MORNING/.

9 PM Update .

Tropical Storm Fay is weakening as it tracks northward along the northern New Jersey coast. This system will pass to the west of our region tracking near the Hudson Valley. Despite the very high Pwats, the main heavy rain/flash flood threat is west of the track. Based on latest radar imagery and high resolution CAMs overnight, feel the threat of Flash Flooding is quite low across the region overnight. Therefore, we opted to drop the rest of the Flash Flood Watch. Bands of scattered showers may still result in brief heavy rainfall and typical localized nuisance poor drainage street flooding overnight. However, significant flooding is not expected in our region.

The severe weather threat is also quite low overnight given extremely low instability, despite high 0-1 KM helicity values.

SHORT TERM /6 AM SATURDAY MORNING THROUGH 6 PM SATURDAY/. Fay should be well into northern New England/upstate NY by Saturday morning, and even farther north by the end of the day. Expecting the rainfall to briefly abate during the morning. While dry weather will likely persist across eastern MA/RI through the afternoon, a few strong thunderstorms are possible across western MA and CT into the evening with greatest risk near and west of the CT River Valley. Modest instability will develop across interior southern New England with 1500 to 2500 J/KG of CAPE. While deep layer shear is limited, modest low level wind fields may result in a few strong to severe thunderstorms. There also could be some training, so torrential rainfall/localized flooding would be possible.

Tropical humidity will continue, as will above normal temperatures.

High Surf/Dangerous Rip Currents .

We will have to monitor the potential for high surf and dangerous rip currents Saturday. This a result of leftover swell, which may be problematic for beachgoers.

LONG TERM /SATURDAY NIGHT THROUGH FRIDAY/. Highlights .

* Breezy Sunday with chances of scattered showers and thunderstorms across the interior.

* Widespread shower and thunderstorm chances on Monday before the drier weather returns

* Slightly cooler and less humid early to mid next week. Heat and humidity returns late in the week.

Details .

Amplified flow pattern initially in the extended, but will transition to more of a zonal pattern by mid next week. This will initially keep the Northeast under a broad trough, which will bring periodic shower/thunderstorm chances. High pressure becoming more dominant late in the week with several weak disturbances sliding through that are hard to time out.

Saturday Night through Sunday Night .

Shortwave trough lifting from the eastern Great Lakes into northern New England through this period. Will see another trough lift from the central Great Lakes into the eastern Great Lakes late on Saturday into Sunday.

The showers and thunderstorms associated with the first wave will linger into the night time hours, but will diminish in coverage as a dry slot works its way into the region. Will remain warm across southern New England as moisture lingering within the boundary layer. Lows will generally be in the low 70s across much of southern New England.

Expect strong heating due to the clearing from the dry slot on Sunday. In addition will still have the trough nearby in northern New England. Not out of the question there could be a few strong to severe thunderstorms. Bulk shear values within the 0-6 km layer increase to 25-35 kts with around 1000 J/kg of MUCAPE. This couples with nearly adiabatic low level lapse rates and mid level lapse rates approaching 7 degrees Celsius per km - which would be supportive for stronger updraft maintenance. Still anticipate it to be breezy with a 25-30 kt 925 hPa jet overhead/nearby.

Low level winds at 925 hPa will shift to a westerly direction, which will bring strong downsloping to southern New England. Have bumped up high temperatures to the 75th percentile of guidance. This results in readings ranging from the 80s across many locations to the low 90s in the CT and Merrimack River Valleys.

Should see any showers/storm tapering off Sunday evening due to the trough exiting and the loss of day time heating. Skies should clear quickly with some weak ridging in wake of the trough lifting out and the other trough lifting in. Nudged down lows to the 25th percentile of guidance as am anticipating strong radiational cooling. Lows will generally be in the 60s, but could see some 70 degree readings along coastal locations.

Monday through Tuesday .

Trough lifts into New England on Monday bringing a better shot of widespread shower and thunderstorm activity. Will be slightly cooler as a result of the increased cloud cover in place. Best shot of showers and thunderstorms is across the interior. Closed low forms over northern New England, which will keep shower and thunderstorm chances in the forecast. This will shift flow to westerly/northwesterly flow at 850 hPa, which will advect cooler air into the region. Expect the coolest readings on Tuesday with readings in the low to mid 80s.

Wednesday through Thursday .

Drier weather expected mid to late in the week as flow becomes more zonal aloft. High pressure becomes more dominant as it builds into the region. Will see flow become more southwesterly, which will advect a more hot and humid airmass. Temperatures jumping back into the upper 80s in lower 90s across parts of southern New England.

AVIATION /01Z SATURDAY THROUGH WEDNESDAY/. Forecaster Confidence Levels .

Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent.

Tonight . Moderate confidence.

Bands of showers with brief period of torrential rainfall anticipated. Could have some embedded thunder as well, but confidence too low to include in the latest forecast. Expect conditions to deteriorate to IFR. Expect brief periods of LIFR, but should see these conditions dominate over ACK tonight. SE wind gusts of 20 to 30 knots expected with the strongest near the south coast. LLWS expected to develop towards the south coast.

Saturday . Moderate confidence.

Bulk of showers end by mid morning. Will see conditions improving to VFR by late morning/early afternoon as drier air moves in. Still will have to watch for the potential of a few strong thunderstorms developing during the afternoon across western MA/northern CT, with the greatest risk west of the CT River Valley.

KBOS Terminal . Moderate confidence in TAF.

KBDL Terminal . Moderate confidence in TAF.

Outlook /Saturday Night through Wednesday/ .

Saturday Night through Sunday: Mainly VFR, with areas MVFR possible. Breezy. Slight chance SHRA, isolated TSRA.

Sunday Night: Mainly VFR, with local MVFR possible. Breezy. Slight chance SHRA, isolated TSRA.

Monday through Monday Night: Mainly VFR, with areas MVFR possible. Chance SHRA, isolated TSRA.

Tuesday: Mainly VFR, with areas MVFR possible. Slight chance SHRA, isolated TSRA.

Tuesday Night through Wednesday: VFR.

MARINE. Today through Saturday . Moderate confidence.

Tropical Storm Fay looks to pass far enough west of our waters, which should prevent the need for Tropical Headlines. Nonetheless, rough seas will develop across the southern coastal waters with SE winds of 25 to 30 knots. The winds will shift to the southwest Saturday as the remnants of Fay move over northern New England, but 20 to 30 knot wind gusts expected. Rough seas will also continue through Saturday, Small Craft Advisories remain in effect.

Outlook /Saturday Night through Wednesday/ .

Saturday Night: Winds less than 25 kt. Areas of rough seas. Slight chance of rain showers, isolated thunderstorms.

Sunday: Winds less than 25 kt. Areas of rough seas.

Sunday Night: Winds less than 25 kt. Areas of rough seas. Slight chance of rain showers, isolated thunderstorms.

Monday through Monday Night: Winds less than 25 kt. Areas of rough seas. Chance of rain showers, isolated thunderstorms.

Tuesday: Winds less than 25 kt. Areas of rough seas. Slight chance of rain showers, isolated thunderstorms.

Tuesday Night: Winds less than 25 kt. Local rough seas.

Wednesday: Winds less than 25 kt. Seas up to 5 ft.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Small Craft Advisory until 8 PM EDT Saturday for ANZ231>237- 250-251-254>256. Small Craft Advisory from 10 AM to 6 PM EDT Saturday for ANZ230.

SYNOPSIS . Belk/BL NEAR TERM . Frank SHORT TERM . Belk LONG TERM . BL AVIATION . Belk/BL MARINE . Belk/BL


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 2 mi53 min 70°F 72°F1011.3 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 27 mi103 min SE 16 G 18 67°F 3 ft1011.4 hPa
FOXR1 - 8454000 - Providence, RI 43 mi53 min S 17 G 25 76°F 74°F1011.1 hPa
PVDR1 44 mi53 min SE 19 G 25 76°F 1011.1 hPa74°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi53 min SSE 15 G 20 75°F 1011.7 hPa
FRVM3 - 8447386 - Fall River, MA 46 mi53 min 74°F 75°F1011.8 hPa
FRXM3 47 mi53 min 75°F 73°F
IOSN3 - Isle of Shoals, NH 47 mi47 min ESE 21 G 22 69°F 1012.2 hPa (-1.7)69°F
CPTR1 - 8452944 - Conimicut Light, RI 48 mi53 min 74°F 76°F1010.9 hPa
BGXN3 - Great Bay Reserve, NH 49 mi62 min E 2.9 71°F 1014 hPa

Wind History for Providence, RI
(wind in knots)    EDIT      (on/off)   Help
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
Last
24hr
S4
SW3
S5
S7
SW2
S4
SE2
E5
SE5
SE2
S6
S6
G9
S11
G14
S10
G15
S13
G17
S14
G17
S12
G17
S11
S11
G15
SE11
G15
SE13
G17
S14
G19
S15
G23
S16
G22
1 day
ago
SW6
G9
SW7
SW3
SW2
S3
SW3
W5
G8
W4
G7
W5
G10
SW6
W6
S8
S14
G17
S17
S15
S15
G20
S17
G23
S17
G22
S13
S10
G15
S9
G12
SW4
G9
S3
G7
S4
2 days
ago
S8
S3
G6
S3
S6
S6
G9
SW5
S6
S7
G10
S5
G8
S6
SW5
G10
SW8
G11
S10
G14
S9
G13
SW11
G15
SW14
G21
SW12
G19
SW10
G17
W9
G13
SW11
SW8
G11
SW5
SW11
G15
SW5
G9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA1 mi53 minESE 1410.00 miOvercast70°F68°F93%1012.1 hPa
East Milton, MA11 mi56 minESE 13 G 23 mi72°F71°F97%1012.4 hPa
Norwood, Norwood Memorial Airport, MA14 mi54 minE 83.00 miLight Rain Fog/Mist76°F72°F88%1011.1 hPa
Beverly, Beverly Municipal Airport, MA16 mi54 minESE 97.00 miOvercast70°F69°F97%1011.9 hPa
Laurence G Hanscom Field Airport, MA16 mi56 minE 1110.00 miOvercast73°F70°F90%1012.3 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
Last 24hrS5SW7S5S4S5S7S6S5CalmSE3E5E7E9E15E13E14E13E13E14E13E13E13E11E14
1 day agoS5S5SW10SW7SW7SW8SW6W7SW8W54SE9SE7E12E10E8E9E6SE7S12S11S9S8SW7
2 days agoS7S7S7S7S8S8S7S9S8SW13SW9S12SW10SW15
G21
SW13S14
G20
SW17
G20
SW17SW14SW16SW15SW10SW8SW8

Tide / Current Tables for Charlestown, Charles River, Massachusetts
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Charlestown
Click for Map
Fri -- 03:28 AM EDT     10.01 feet High Tide
Fri -- 05:17 AM EDT     Sunrise
Fri -- 09:48 AM EDT     0.40 feet Low Tide
Fri -- 10:41 AM EDT     Moonset
Fri -- 04:05 PM EDT     9.22 feet High Tide
Fri -- 08:21 PM EDT     Sunset
Fri -- 10:06 PM EDT     1.35 feet Low Tide
Fri -- 11:51 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
4.66.78.79.99.88.874.82.60.90.41.32.84.76.88.59.28.87.65.83.92.21.41.9

Tide / Current Tables for Boston Harbor, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Boston Harbor
Click for Map
Fri -- 12:39 AM EDT     1.07 knots Max Flood
Fri -- 03:13 AM EDT     -0.00 knots Slack
Fri -- 05:16 AM EDT     Sunrise
Fri -- 07:40 AM EDT     -1.17 knots Max Ebb
Fri -- 09:50 AM EDT     0.00 knots Slack
Fri -- 10:41 AM EDT     Moonset
Fri -- 01:08 PM EDT     1.10 knots Max Flood
Fri -- 03:47 PM EDT     -0.00 knots Slack
Fri -- 08:11 PM EDT     -1.09 knots Max Ebb
Fri -- 08:21 PM EDT     Sunset
Fri -- 10:15 PM EDT     0.00 knots Slack
Fri -- 11:50 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
11.10.70.1-0.4-0.7-1-1.1-1.2-0.70.10.811.110.5-0.1-0.5-0.8-1-1.1-0.9-0.20.6

Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of Northeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (23,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Boston, MA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.